Harbour warning level

[l3whmg]

Hello to everyone
Is there someone can help me to understand why the Harbour compiler generates a warning when compiling the code below?

Code: Select all

Line 01 MEMVAR _HMG_SYSDATA
Line 02 
Line 03 #include "hmg.ch"
Line 04 
Line 05 FUNCTION main()
Line 06 
Line 07  LOCAL cLocalVar := ""
Line 08 
Line 09  cLocalVar := GetCurrentFolder()
Line 10 
Line 11  MSGSTOP( cLocalVar )
Line 12 
Line 13 RETURN NIL
Line 14 
Line 15 FUNCTION Other()
Line 16 
Line 17  LOCAL cLocalVar
Line 18 
Line 19  cLocalVar := GetCurrentFolder()
Line 20 
Line 21  MSGSTOP( cLocalVar )
Line 22 
Line 23 RETURN NIL

This is the message IF the source is compiled with warning level 3

hbmk2: Processing configuration: D:\HMG\MiniGui\harbour\bin\hbmk.cfg
Harbour 2.0.0 (Rev. 13372)
Copyright (c) 1999-2010, http://www.harbour-project.org/
hbwarntest.prg(15) Warning W0032 Variable 'CLOCALVAR' is assigned but not used in function 'MAIN(7)'

If I set warning level to zero no message displayed (of course)

As you can see, in one case raises the alert while the other not.

Is there a solution to use

Code: Select all

LOCAL cVar := "value"

without warning with level 3?

Best regards

[jparada]

Hi Luigi,

I think you also have to declare MEMVAR cLocalVar.

Regards
Javier

[l3whmg]

Hi Javier, many thanks for your fast replay, but...this it's not the solution
In fact two things:

MEMVAR is a declaration statement .... At runtime, the specified variables must be created using the PRIVATE, PARAMETERS or PUBLIC....

. No required for LOCAL. Any way, I tried your suggestion with the same warning.

In my source I've used two times the same var in two different function, but in one case I've used

Code: Select all

LOCAL cLocalVar := ""

and in other

Code: Select all

LOCAL cLocalVar

(without assigned value); only the first row give me warning

Any way many thanks.

[Carlos Britos]

Hi Javier, many thanks for your fast replay, but...this it's not the solution
In fact two things:

MEMVAR is a declaration statement .... At runtime, the specified variables must be created using the PRIVATE, PARAMETERS or PUBLIC....

. No required for LOCAL. Any way, I tried your suggestion with the same warning.

In my source I've used two times the same var in two different function, but in one case I've used

Code: Select all

LOCAL cLocalVar := ""

and in other

Code: Select all

LOCAL cLocalVar

(without assigned value); only the first row give me warning

Any way many thanks.

Hi l3whmg
Is the normal Harbour behaviour of switch -w3
If you assign the "" to cLocalVar and later in the code assign another value then the first assignement is unused, but if you set LOCAL cLocalVar := "" and later use: cLocalVar += "something" then there is no warning.

[Rathinagiri]

If you assign the "" to cLocalVar and later in the code assign another value then the first assignement is unused, but if you set LOCAL cLocalVar := "" and later use: cLocalVar += "something" then there is no warning.

Nice explanation Carlos. Thanks.

[l3whmg]

Hi Carlos, many thanks for you answer.
I had sensed this "behaviour" but I was hoping there was an alternative.
Any way, I will try to align the source code to this rule.
Many thanks